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gimp/app/levels.c
Michael Natterer 002aa905db app/Makefile.am app/gimphelp.[ch] new files 
1999-09-27  Michael Natterer  <mitch@gimp.org>

	* app/Makefile.am
	* app/gimphelp.[ch]
	* app/gimpui.[ch]: new files

	* app/interface.[ch]
	* app/preferences_dialog.[ch]

	The GIMP Help System part 1: Press "F1" in any dialog to pop up
	the help page for this dialog.

	Moved the widget constructors from preferences_dialog.[ch] and the
	query boxes from interface.[ch] to gimpui.[ch].

	The dialog constructors take a help_func and a help_data
	parameter and install the "F1" accelerator which emits the new
	"help" signal.

	The "help" signal callback calls help_func(help_data) which finally
	has to call gimp_help() which in turn invokes the help browser.

	Still have to find a proper way to (1) prevent "F1" being assigned
	to some menu item and (2) to catch "F1" while browsing the menu
	trees in order to pop up the help for the selected item.

	* app/menus.c: a <Toolbox>/File/Help... menu item.
	* app/commands.[ch]: a command callback for the "Help..." menu item.

	* app/gimprc.[ch]: new boolean gimprc variable "use_help".

	* app/info_dialog.[ch]: pass a help function and data to the info
	dialog constructor.

	* app/tools.[ch]: store the tools help page names in the tool info
	structure. Export a special tools_help_func() which shows the help
	page for the active tool.

	* app/[all files calling a dialog constructor]: pass the dialog's
	help page to the constructor.

	Most dialogs are now created by gimp_dialog_new() which also sets
	up the action_area and the WM delete event callback, so I removed
	the resp. code from these files.

	Fixed some minor bugs and did some other stuff but didn't change
	any logic except dialog creation.

	* plug-ins/helpbrowser/helpbrowser.c: don't try to call a running
	help browser and don't install any menu path (all done in
	app/gimphelp.[ch] now).
1999-09-27 17:58:10 +00:00

1510 lines
41 KiB
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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include "appenv.h"
#include "buildmenu.h"
#include "colormaps.h"
#include "drawable.h"
#include "general.h"
#include "gdisplay.h"
#include "histogramwidget.h"
#include "gimphistogram.h"
#include "gimpui.h"
#include "image_map.h"
#include "interface.h"
#include "levels.h"
#include "gimplut.h"
#include "lut_funcs.h"
#include "libgimp/gimpintl.h"
#include "libgimp/gimpenv.h"
#define LOW_INPUT 0x1
#define GAMMA 0x2
#define HIGH_INPUT 0x4
#define LOW_OUTPUT 0x8
#define HIGH_OUTPUT 0x10
#define INPUT_LEVELS 0x20
#define OUTPUT_LEVELS 0x40
#define INPUT_SLIDERS 0x80
#define OUTPUT_SLIDERS 0x100
#define DRAW 0x200
#define ALL 0xFFF
#define TEXT_WIDTH 45
#define DA_WIDTH 256
#define DA_HEIGHT 25
#define GRADIENT_HEIGHT 15
#define CONTROL_HEIGHT DA_HEIGHT - GRADIENT_HEIGHT
#define HISTOGRAM_WIDTH 256
#define HISTOGRAM_HEIGHT 150
#define LEVELS_DA_MASK GDK_EXPOSURE_MASK | \
GDK_ENTER_NOTIFY_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON1_MOTION_MASK | \
GDK_POINTER_MOTION_HINT_MASK
/* the levels structures */
typedef struct _Levels Levels;
struct _Levels
{
int x, y; /* coords for last mouse click */
};
typedef struct _LevelsDialog LevelsDialog;
struct _LevelsDialog
{
GtkWidget * shell;
GtkWidget * low_input_spin;
GtkAdjustment *low_input_adj;
GtkWidget * gamma_text;
GtkWidget * high_input_spin;
GtkAdjustment *high_input_adj;
GtkWidget * low_output_spin;
GtkAdjustment *low_output_adj;
GtkWidget * high_output_spin;
GtkAdjustment *high_output_adj;
GtkWidget * input_levels_da[2];
GtkWidget * output_levels_da[2];
GtkWidget * channel_menu;
HistogramWidget *histogram;
GimpHistogram *hist;
GimpDrawable * drawable;
ImageMap image_map;
int color;
int channel;
int low_input[5];
double gamma[5];
int high_input[5];
int low_output[5];
int high_output[5];
gint preview;
int active_slider;
int slider_pos[5]; /* positions for the five sliders */
unsigned char input[5][256]; /* this is used only by the gui */
GimpLut *lut;
};
/* the levels tool options */
static ToolOptions *levels_options = NULL;
/* the levels tool dialog */
static LevelsDialog *levels_dialog = NULL;
/* the levels file dialog */
static GtkWidget *file_dlg = NULL;
static gboolean load_save;
/* levels action functions */
static void levels_control (Tool *, ToolAction, gpointer);
static LevelsDialog * levels_new_dialog (void);
static void levels_calculate_transfers (LevelsDialog *);
static void levels_update (LevelsDialog *, int);
static void levels_preview (LevelsDialog *);
static void levels_value_callback (GtkWidget *, gpointer);
static void levels_red_callback (GtkWidget *, gpointer);
static void levels_green_callback (GtkWidget *, gpointer);
static void levels_blue_callback (GtkWidget *, gpointer);
static void levels_alpha_callback (GtkWidget *, gpointer);
static void levels_auto_levels_callback (GtkWidget *, gpointer);
static void levels_ok_callback (GtkWidget *, gpointer);
static void levels_cancel_callback (GtkWidget *, gpointer);
static void levels_load_callback (GtkWidget *, gpointer);
static void levels_save_callback (GtkWidget *, gpointer);
static void levels_preview_update (GtkWidget *, gpointer);
static void levels_low_input_spin_update (GtkWidget *, gpointer);
static void levels_gamma_text_update (GtkWidget *, gpointer);
static void levels_high_input_spin_update (GtkWidget *, gpointer);
static void levels_low_output_spin_update (GtkWidget *, gpointer);
static void levels_high_output_spin_update (GtkWidget *, gpointer);
static gint levels_input_da_events (GtkWidget *, GdkEvent *,
LevelsDialog *);
static gint levels_output_da_events (GtkWidget *, GdkEvent *,
LevelsDialog *);
static void levels_histogram_range (HistogramWidget *,
int, int, void *);
static void make_file_dlg (gpointer);
static void file_ok_callback (GtkWidget *, gpointer);
static void file_cancel_callback (GtkWidget *, gpointer);
static gint read_levels_from_file (FILE *f);
static void write_levels_to_file (FILE *f);
static void
levels_histogram_range (HistogramWidget *h,
int start,
int end,
void *user_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) user_data;
histogram_widget_range (ld->histogram, -1, -1);
}
/* levels action functions */
static void
levels_control (Tool *tool,
ToolAction action,
gpointer gdisp_ptr)
{
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
if (levels_dialog)
levels_cancel_callback (NULL, (gpointer) levels_dialog);
break;
default:
break;
}
}
Tool *
tools_new_levels ()
{
Tool * tool;
Levels * private;
/* The tool options */
if (! levels_options)
{
levels_options = tool_options_new (_("Levels Options"));
tools_register (LEVELS, levels_options);
}
tool = tools_new_tool (LEVELS);
private = g_new (Levels, 1);
tool->scroll_lock = TRUE; /* Disallow scrolling */
tool->preserve = FALSE; /* Don't preserve on drawable change */
tool->private = (void *) private;
tool->control_func = levels_control;
return tool;
}
void
tools_free_levels (Tool *tool)
{
Levels * _levels;
_levels = (Levels *) tool->private;
/* Close the color select dialog */
if (levels_dialog)
levels_cancel_callback (NULL, (gpointer) levels_dialog);
g_free (_levels);
}
static MenuItem color_option_items[] =
{
{ N_("Value"), 0, 0, levels_value_callback, NULL, NULL, NULL },
{ N_("Red"), 0, 0, levels_red_callback, NULL, NULL, NULL },
{ N_("Green"), 0, 0, levels_green_callback, NULL, NULL, NULL },
{ N_("Blue"), 0, 0, levels_blue_callback, NULL, NULL, NULL },
{ N_("Alpha"), 0, 0, levels_alpha_callback, NULL, NULL, NULL },
{ NULL, 0, 0, NULL, NULL, NULL, NULL }
};
void
levels_initialize (GDisplay *gdisp)
{
int i;
if (drawable_indexed (gimage_active_drawable (gdisp->gimage)))
{
g_message (_("Levels for indexed drawables cannot be adjusted."));
return;
}
/* The levels dialog */
if (!levels_dialog)
levels_dialog = levels_new_dialog ();
else
if (!GTK_WIDGET_VISIBLE (levels_dialog->shell))
gtk_widget_show (levels_dialog->shell);
/* Initialize the values */
levels_dialog->channel = HISTOGRAM_VALUE;
for (i = 0; i < 5; i++)
{
levels_dialog->low_input[i] = 0;
levels_dialog->gamma[i] = 1.0;
levels_dialog->high_input[i] = 255;
levels_dialog->low_output[i] = 0;
levels_dialog->high_output[i] = 255;
}
levels_dialog->drawable = gimage_active_drawable (gdisp->gimage);
levels_dialog->color = drawable_color (levels_dialog->drawable);
levels_dialog->image_map = image_map_create (gdisp, levels_dialog->drawable);
/* check for alpha channel */
if (drawable_has_alpha (levels_dialog->drawable))
gtk_widget_set_sensitive( color_option_items[4].widget, TRUE);
else
gtk_widget_set_sensitive( color_option_items[4].widget, FALSE);
/* hide or show the channel menu based on image type */
if (levels_dialog->color)
for (i = 0; i < 4; i++)
gtk_widget_set_sensitive( color_option_items[i].widget, TRUE);
else
for (i = 1; i < 4; i++)
gtk_widget_set_sensitive( color_option_items[i].widget, FALSE);
/* set the current selection */
gtk_option_menu_set_history ( GTK_OPTION_MENU (levels_dialog->channel_menu), 0);
levels_update (levels_dialog, LOW_INPUT | GAMMA | HIGH_INPUT | LOW_OUTPUT | HIGH_OUTPUT | DRAW);
levels_update (levels_dialog, INPUT_LEVELS | OUTPUT_LEVELS);
gimp_histogram_calculate_drawable (levels_dialog->hist,
levels_dialog->drawable);
histogram_widget_update(levels_dialog->histogram, levels_dialog->hist);
histogram_widget_range (levels_dialog->histogram, -1, -1);
}
void
levels_free ()
{
if (levels_dialog)
{
if (levels_dialog->image_map)
{
active_tool->preserve = TRUE;
image_map_abort (levels_dialog->image_map);
active_tool->preserve = FALSE;
levels_dialog->image_map = NULL;
}
gtk_widget_destroy (levels_dialog->shell);
}
}
/*******************/
/* Levels dialog */
/*******************/
static LevelsDialog *
levels_new_dialog ()
{
LevelsDialog *ld;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *vbox2;
GtkWidget *label;
GtkWidget *frame;
GtkWidget *toggle;
GtkWidget *channel_hbox;
GtkWidget *menu;
GtkWidget *hbbox;
GtkWidget *button;
gint i;
ld = g_new (LevelsDialog, 1);
ld->preview = TRUE;
ld->lut = gimp_lut_new();
ld->hist = gimp_histogram_new();
for (i = 0; i < 5; i++)
color_option_items [i].user_data = (gpointer) ld;
/* The shell and main vbox */
ld->shell = gimp_dialog_new (_("Levels"), "levels",
tools_help_func, NULL,
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
_("Auto Levels"), levels_auto_levels_callback,
ld, NULL, FALSE, FALSE,
_("OK"), levels_ok_callback,
ld, NULL, TRUE, FALSE,
_("Cancel"), levels_cancel_callback,
ld, NULL, FALSE, TRUE,
NULL);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (ld->shell)->vbox), vbox);
/* The option menu for selecting channels */
channel_hbox = gtk_hbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (vbox), channel_hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Modify Levels for Channel: "));
gtk_box_pack_start (GTK_BOX (channel_hbox), label, FALSE, FALSE, 0);
menu = build_menu (color_option_items, NULL);
ld->channel_menu = gtk_option_menu_new ();
gtk_box_pack_start (GTK_BOX (channel_hbox), ld->channel_menu, FALSE, FALSE, 2);
gtk_widget_show (label);
gtk_widget_show (ld->channel_menu);
gtk_widget_show (channel_hbox);
gtk_option_menu_set_menu (GTK_OPTION_MENU (ld->channel_menu), menu);
/* Horizontal box for levels text and spin widgets */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Input Levels: "));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* low input spin */
ld->low_input_adj = GTK_ADJUSTMENT(gtk_adjustment_new (0, 0, 255, 1, 10, 10));
ld->low_input_spin = gtk_spin_button_new (ld->low_input_adj, 0.5, 0);
gtk_spin_button_set_numeric(GTK_SPIN_BUTTON(ld->low_input_spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), ld->low_input_spin, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (ld->low_input_adj), "value_changed",
(GtkSignalFunc) levels_low_input_spin_update,
ld);
gtk_widget_show (ld->low_input_spin);
/* input gamma text */
ld->gamma_text = gtk_entry_new ();
gtk_entry_set_text (GTK_ENTRY (ld->gamma_text), "1.0");
gtk_widget_set_usize (ld->gamma_text, TEXT_WIDTH, 25);
gtk_box_pack_start (GTK_BOX (hbox), ld->gamma_text, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (ld->gamma_text), "changed",
(GtkSignalFunc) levels_gamma_text_update,
ld);
gtk_widget_show (ld->gamma_text);
gtk_widget_show (hbox);
/* high input spin */
ld->high_input_adj = GTK_ADJUSTMENT(gtk_adjustment_new (255, 0, 255, 1, 10, 10));
ld->high_input_spin = gtk_spin_button_new (ld->high_input_adj, 0.5, 0);
gtk_spin_button_set_numeric(GTK_SPIN_BUTTON(ld->high_input_spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), ld->high_input_spin, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (ld->high_input_adj), "value_changed",
(GtkSignalFunc) levels_high_input_spin_update,
ld);
gtk_widget_show (ld->high_input_spin);
gtk_widget_show (hbox);
/* The levels histogram */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, FALSE, 0);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, FALSE, 0);
ld->histogram = histogram_widget_new(HISTOGRAM_WIDTH, HISTOGRAM_HEIGHT);
gtk_signal_connect (GTK_OBJECT (ld->histogram), "rangechanged",
(GtkSignalFunc) levels_histogram_range,
(void*)ld);
gtk_container_add (GTK_CONTAINER (frame), GTK_WIDGET(ld->histogram));
gtk_widget_show (GTK_WIDGET(ld->histogram));
gtk_widget_show (frame);
gtk_widget_show (hbox);
/* The input levels drawing area */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, FALSE, 0);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
vbox2 = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
ld->input_levels_da[0] = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (ld->input_levels_da[0]), DA_WIDTH, GRADIENT_HEIGHT);
gtk_widget_set_events (ld->input_levels_da[0], LEVELS_DA_MASK);
gtk_signal_connect (GTK_OBJECT (ld->input_levels_da[0]), "event",
(GtkSignalFunc) levels_input_da_events,
ld);
gtk_box_pack_start (GTK_BOX (vbox2), ld->input_levels_da[0], FALSE, TRUE, 0);
ld->input_levels_da[1] = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (ld->input_levels_da[1]), DA_WIDTH, CONTROL_HEIGHT);
gtk_widget_set_events (ld->input_levels_da[1], LEVELS_DA_MASK);
gtk_signal_connect (GTK_OBJECT (ld->input_levels_da[1]), "event",
(GtkSignalFunc) levels_input_da_events,
ld);
gtk_box_pack_start (GTK_BOX (vbox2), ld->input_levels_da[1], FALSE, TRUE, 0);
gtk_widget_show (ld->input_levels_da[0]);
gtk_widget_show (ld->input_levels_da[1]);
gtk_widget_show (vbox2);
gtk_widget_show (frame);
gtk_widget_show (hbox);
/* Horizontal box for levels spin widgets */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Output Levels: "));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* low output spin */
ld->low_output_adj = GTK_ADJUSTMENT(gtk_adjustment_new (0, 0, 255, 1, 10, 10));
ld->low_output_spin = gtk_spin_button_new (ld->low_output_adj, 0.5, 0);
gtk_spin_button_set_numeric(GTK_SPIN_BUTTON(ld->low_input_spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), ld->low_output_spin, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (ld->low_output_adj), "value_changed",
(GtkSignalFunc) levels_low_output_spin_update,
ld);
gtk_widget_show (ld->low_output_spin);
/* high output spin */
ld->high_output_adj = GTK_ADJUSTMENT(gtk_adjustment_new (255, 0, 255, 1, 10, 10));
ld->high_output_spin = gtk_spin_button_new (ld->high_output_adj, 0.5, 0);
gtk_spin_button_set_numeric(GTK_SPIN_BUTTON(ld->high_input_spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), ld->high_output_spin, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (ld->high_output_adj), "value_changed",
(GtkSignalFunc) levels_high_output_spin_update,
ld);
gtk_widget_show (ld->high_output_spin);
gtk_widget_show (hbox);
/* The output levels drawing area */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, FALSE, 0);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
vbox2 = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
ld->output_levels_da[0] = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (ld->output_levels_da[0]), DA_WIDTH, GRADIENT_HEIGHT);
gtk_widget_set_events (ld->output_levels_da[0], LEVELS_DA_MASK);
gtk_signal_connect (GTK_OBJECT (ld->output_levels_da[0]), "event",
(GtkSignalFunc) levels_output_da_events,
ld);
gtk_box_pack_start (GTK_BOX (vbox2), ld->output_levels_da[0], FALSE, TRUE, 0);
ld->output_levels_da[1] = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (ld->output_levels_da[1]), DA_WIDTH, CONTROL_HEIGHT);
gtk_widget_set_events (ld->output_levels_da[1], LEVELS_DA_MASK);
gtk_signal_connect (GTK_OBJECT (ld->output_levels_da[1]), "event",
(GtkSignalFunc) levels_output_da_events,
ld);
gtk_box_pack_start (GTK_BOX (vbox2), ld->output_levels_da[1], FALSE, TRUE, 0);
gtk_widget_show (ld->output_levels_da[0]);
gtk_widget_show (ld->output_levels_da[1]);
gtk_widget_show (vbox2);
gtk_widget_show (frame);
gtk_widget_show (hbox);
/* Horizontal button box for load/sve */
hbbox = gtk_hbutton_box_new ();
gtk_button_box_set_spacing (GTK_BUTTON_BOX (hbbox), 4);
gtk_button_box_set_layout (GTK_BUTTON_BOX (hbbox), GTK_BUTTONBOX_SPREAD);
gtk_box_pack_start (GTK_BOX (vbox), hbbox, FALSE, FALSE, 0);
/* The preview toggle */
toggle = gtk_check_button_new_with_label (_("Preview"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), ld->preview);
gtk_box_pack_start (GTK_BOX (hbbox), toggle, TRUE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) levels_preview_update,
ld);
gtk_widget_show (toggle);
button = gtk_button_new_with_label (_("Load"));
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) levels_load_callback,
NULL);
gtk_widget_show (button);
button = gtk_button_new_with_label (_("Save"));
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) levels_save_callback,
NULL);
gtk_widget_show (button);
gtk_widget_show (hbbox);
gtk_widget_show (vbox);
gtk_widget_show (ld->shell);
return ld;
}
static void
levels_draw_slider (GdkWindow *window,
GdkGC *border_gc,
GdkGC *fill_gc,
int xpos)
{
int y;
for (y = 0; y < CONTROL_HEIGHT; y++)
gdk_draw_line(window, fill_gc, xpos - y / 2, y,
xpos + y / 2, y);
gdk_draw_line(window, border_gc, xpos, 0,
xpos - (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1);
gdk_draw_line(window, border_gc, xpos, 0,
xpos + (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1);
gdk_draw_line(window, border_gc, xpos - (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1,
xpos + (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1);
}
static void
levels_erase_slider (GdkWindow *window,
int xpos)
{
gdk_window_clear_area (window, xpos - (CONTROL_HEIGHT - 1) / 2, 0,
CONTROL_HEIGHT - 1, CONTROL_HEIGHT);
}
static void
levels_calculate_transfers (LevelsDialog *ld)
{
double inten;
int i, j;
/* Recalculate the levels arrays */
for (j = 0; j < 5; j++)
{
for (i = 0; i < 256; i++)
{
/* determine input intensity */
if (ld->high_input[j] != ld->low_input[j])
inten = (double) (i - ld->low_input[j]) /
(double) (ld->high_input[j] - ld->low_input[j]);
else
inten = (double) (i - ld->low_input[j]);
inten = BOUNDS (inten, 0.0, 1.0);
if (ld->gamma[j] != 0.0)
inten = pow (inten, (1.0 / ld->gamma[j]));
ld->input[j][i] = (unsigned char) (inten * 255.0 + 0.5);
}
}
}
static void
levels_update (LevelsDialog *ld,
int update)
{
char text[12];
int i;
/* Recalculate the transfer arrays */
levels_calculate_transfers (ld);
/* set up the lut */
levels_lut_setup(ld->lut, ld->gamma, ld->low_input, ld->high_input,
ld->low_output, ld->high_output,
gimp_drawable_bytes(ld->drawable));
if (update & LOW_INPUT)
{
gtk_spin_button_set_value (GTK_SPIN_BUTTON(ld->low_input_spin),
ld->low_input[ld->channel]);
}
if (update & GAMMA)
{
sprintf (text, "%2.2f", ld->gamma[ld->channel]);
gtk_entry_set_text (GTK_ENTRY (ld->gamma_text), text);
}
if (update & HIGH_INPUT)
{
gtk_spin_button_set_value (GTK_SPIN_BUTTON(ld->high_input_spin),
ld->high_input[ld->channel]);
}
if (update & LOW_OUTPUT)
{
gtk_spin_button_set_value (GTK_SPIN_BUTTON(ld->low_output_spin),
ld->low_output[ld->channel]);
}
if (update & HIGH_OUTPUT)
{
gtk_spin_button_set_value (GTK_SPIN_BUTTON(ld->high_output_spin),
ld->high_output[ld->channel]);
}
if (update & INPUT_LEVELS)
{
unsigned char buf[DA_WIDTH*3];
switch (ld->channel) {
default:
g_warning ("unknown channel type, can't happen\n");
/* fall through */
case HISTOGRAM_VALUE:
case HISTOGRAM_ALPHA:
for (i = 0; i < DA_WIDTH; i++)
{
buf[3*i+0] = ld->input[ld->channel][i];
buf[3*i+1] = ld->input[ld->channel][i];
buf[3*i+2] = ld->input[ld->channel][i];
}
break;
case HISTOGRAM_RED:
case HISTOGRAM_GREEN:
case HISTOGRAM_BLUE:
for (i = 0; i < DA_WIDTH; i++)
{
buf[3*i+0] = ld->input[HISTOGRAM_RED][i];
buf[3*i+1] = ld->input[HISTOGRAM_GREEN][i];
buf[3*i+2] = ld->input[HISTOGRAM_BLUE][i];
}
break;
}
for (i = 0; i < GRADIENT_HEIGHT/2; i++)
gtk_preview_draw_row (GTK_PREVIEW (ld->input_levels_da[0]),
buf, 0, i, DA_WIDTH);
for (i = 0; i < DA_WIDTH; i++)
{
buf[3*i+0] = i;
buf[3*i+1] = i;
buf[3*i+2] = i;
}
for (i = GRADIENT_HEIGHT/2; i < GRADIENT_HEIGHT; i++)
gtk_preview_draw_row (GTK_PREVIEW (ld->input_levels_da[0]),
buf, 0, i, DA_WIDTH);
if (update & DRAW)
gtk_widget_draw (ld->input_levels_da[0], NULL);
}
if (update & OUTPUT_LEVELS)
{
unsigned char buf[DA_WIDTH*3];
unsigned char r, g, b;
r = g = b = 0;
switch (ld->channel) {
default:
g_warning ("unknown channel type, can't happen\n");
/* fall through */
case HISTOGRAM_VALUE:
case HISTOGRAM_ALPHA: r = g = b = 1; break;
case HISTOGRAM_RED: r = 1; break;
case HISTOGRAM_GREEN: g = 1; break;
case HISTOGRAM_BLUE: b = 1; break;
}
for (i = 0; i < DA_WIDTH; i++)
{
buf[3*i+0] = i*r;
buf[3*i+1] = i*g;
buf[3*i+2] = i*b;
}
for (i = 0; i < GRADIENT_HEIGHT; i++)
gtk_preview_draw_row (GTK_PREVIEW (ld->output_levels_da[0]),
buf, 0, i, DA_WIDTH);
if (update & DRAW)
gtk_widget_draw (ld->output_levels_da[0], NULL);
}
if (update & INPUT_SLIDERS)
{
double width, mid, tmp;
levels_erase_slider (ld->input_levels_da[1]->window, ld->slider_pos[0]);
levels_erase_slider (ld->input_levels_da[1]->window, ld->slider_pos[1]);
levels_erase_slider (ld->input_levels_da[1]->window, ld->slider_pos[2]);
ld->slider_pos[0] = DA_WIDTH * ((double) ld->low_input[ld->channel] / 255.0);
ld->slider_pos[2] = DA_WIDTH * ((double) ld->high_input[ld->channel] / 255.0);
width = (double) (ld->slider_pos[2] - ld->slider_pos[0]) / 2.0;
mid = ld->slider_pos[0] + width;
tmp = log10 (1.0 / ld->gamma[ld->channel]);
ld->slider_pos[1] = (int) (mid + width * tmp + 0.5);
levels_draw_slider (ld->input_levels_da[1]->window,
ld->input_levels_da[1]->style->black_gc,
ld->input_levels_da[1]->style->dark_gc[GTK_STATE_NORMAL],
ld->slider_pos[1]);
levels_draw_slider (ld->input_levels_da[1]->window,
ld->input_levels_da[1]->style->black_gc,
ld->input_levels_da[1]->style->black_gc,
ld->slider_pos[0]);
levels_draw_slider (ld->input_levels_da[1]->window,
ld->input_levels_da[1]->style->black_gc,
ld->input_levels_da[1]->style->white_gc,
ld->slider_pos[2]);
}
if (update & OUTPUT_SLIDERS)
{
levels_erase_slider (ld->output_levels_da[1]->window, ld->slider_pos[3]);
levels_erase_slider (ld->output_levels_da[1]->window, ld->slider_pos[4]);
ld->slider_pos[3] = DA_WIDTH * ((double) ld->low_output[ld->channel] / 255.0);
ld->slider_pos[4] = DA_WIDTH * ((double) ld->high_output[ld->channel] / 255.0);
levels_draw_slider (ld->output_levels_da[1]->window,
ld->output_levels_da[1]->style->black_gc,
ld->output_levels_da[1]->style->black_gc,
ld->slider_pos[3]);
levels_draw_slider (ld->output_levels_da[1]->window,
ld->output_levels_da[1]->style->black_gc,
ld->output_levels_da[1]->style->white_gc,
ld->slider_pos[4]);
}
}
static void
levels_preview (LevelsDialog *ld)
{
if (!ld->image_map)
g_warning ("No image map");
active_tool->preserve = TRUE;
image_map_apply (ld->image_map, (ImageMapApplyFunc)gimp_lut_process_2,
(void *) ld->lut);
active_tool->preserve = FALSE;
}
static void
levels_value_callback (GtkWidget *w,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (ld->channel != HISTOGRAM_VALUE)
{
ld->channel = HISTOGRAM_VALUE;
histogram_widget_channel (ld->histogram, ld->channel);
levels_update (ld, ALL);
}
}
static void
levels_red_callback (GtkWidget *w,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (ld->channel != HISTOGRAM_RED)
{
ld->channel = HISTOGRAM_RED;
histogram_widget_channel (ld->histogram, ld->channel);
levels_update (ld, ALL);
}
}
static void
levels_green_callback (GtkWidget *w,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (ld->channel != HISTOGRAM_GREEN)
{
ld->channel = HISTOGRAM_GREEN;
histogram_widget_channel (ld->histogram, ld->channel);
levels_update (ld, ALL);
}
}
static void
levels_blue_callback (GtkWidget *w,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (ld->channel != HISTOGRAM_BLUE)
{
ld->channel = HISTOGRAM_BLUE;
histogram_widget_channel (ld->histogram, ld->channel);
levels_update (ld, ALL);
}
}
static void
levels_alpha_callback (GtkWidget *w,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (ld->channel != HISTOGRAM_ALPHA)
{
ld->channel = HISTOGRAM_ALPHA;
histogram_widget_channel (ld->histogram, ld->channel);
levels_update (ld, ALL);
}
}
static void
levels_adjust_channel (LevelsDialog *ld,
GimpHistogram *hist,
int channel)
{
int i;
double count, new_count, percentage, next_percentage;
ld->gamma[channel] = 1.0;
ld->low_output[channel] = 0;
ld->high_output[channel] = 255;
count = gimp_histogram_get_count(hist, 0, 255);
if (count == 0.0)
{
ld->low_input[channel] = 0;
ld->high_input[channel] = 0;
}
else
{
/* Set the low input */
new_count = 0.0;
for (i = 0; i < 255; i++)
{
new_count += gimp_histogram_get_value(hist, channel, i);
percentage = new_count / count;
next_percentage = (new_count + gimp_histogram_get_value(hist,
channel,
i + 1)) /
count;
if (fabs (percentage - 0.006) < fabs (next_percentage - 0.006))
{
ld->low_input[channel] = i + 1;
break;
}
}
/* Set the high input */
new_count = 0.0;
for (i = 255; i > 0; i--)
{
new_count += gimp_histogram_get_value(hist, channel, i);
percentage = new_count / count;
next_percentage = (new_count + gimp_histogram_get_value(hist,
channel,
i - 1)) / count;
if (fabs (percentage - 0.006) < fabs (next_percentage - 0.006))
{
ld->high_input[channel] = i - 1;
break;
}
}
}
}
static void
levels_auto_levels_callback (GtkWidget *widget,
gpointer client_data)
{
LevelsDialog *ld;
int channel;
ld = (LevelsDialog *) client_data;
if (ld->color)
{
/* Set the overall value to defaults */
ld->low_input[HISTOGRAM_VALUE] = 0;
ld->gamma[HISTOGRAM_VALUE] = 1.0;
ld->high_input[HISTOGRAM_VALUE] = 255;
ld->low_output[HISTOGRAM_VALUE] = 0;
ld->high_output[HISTOGRAM_VALUE] = 255;
for (channel = 0; channel < 3; channel ++)
levels_adjust_channel (ld, ld->hist, channel + 1);
}
else
levels_adjust_channel (ld, ld->hist, HISTOGRAM_VALUE);
levels_update (ld, ALL);
if (ld->preview)
levels_preview (ld);
}
static void
levels_ok_callback (GtkWidget *widget,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (GTK_WIDGET_VISIBLE (ld->shell))
gtk_widget_hide (ld->shell);
active_tool->preserve = TRUE;
if (!ld->preview)
{
levels_lut_setup(ld->lut, ld->gamma, ld->low_input, ld->high_input,
ld->low_output, ld->high_output,
gimp_drawable_bytes(ld->drawable));
image_map_apply (ld->image_map, (ImageMapApplyFunc)gimp_lut_process_2,
(void *) ld->lut);
}
if (ld->image_map)
image_map_commit (ld->image_map);
active_tool->preserve = FALSE;
ld->image_map = NULL;
active_tool->gdisp_ptr = NULL;
active_tool->drawable = NULL;
}
static void
levels_cancel_callback (GtkWidget *widget,
gpointer client_data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) client_data;
if (GTK_WIDGET_VISIBLE (ld->shell))
gtk_widget_hide (ld->shell);
if (ld->image_map)
{
active_tool->preserve = TRUE;
image_map_abort (ld->image_map);
active_tool->preserve = FALSE;
gdisplays_flush ();
ld->image_map = NULL;
}
active_tool->gdisp_ptr = NULL;
active_tool->drawable = NULL;
}
static void
levels_load_callback (GtkWidget *widget,
gpointer client_data)
{
if (!file_dlg)
make_file_dlg (NULL);
else if (GTK_WIDGET_VISIBLE (file_dlg))
return;
load_save = TRUE;
gtk_window_set_title(GTK_WINDOW (file_dlg), _("Load Levels"));
gtk_widget_show (file_dlg);
}
static void
levels_save_callback (GtkWidget *widget,
gpointer client_data)
{
if (!file_dlg)
make_file_dlg (NULL);
else if (GTK_WIDGET_VISIBLE (file_dlg))
return;
load_save = FALSE;
gtk_window_set_title(GTK_WINDOW (file_dlg), _("Save Levels"));
gtk_widget_show (file_dlg);
}
static void
levels_preview_update (GtkWidget *w,
gpointer data)
{
LevelsDialog *ld;
ld = (LevelsDialog *) data;
if (GTK_TOGGLE_BUTTON (w)->active)
{
ld->preview = TRUE;
levels_preview (ld);
}
else
ld->preview = FALSE;
}
static void
levels_low_input_spin_update (GtkWidget *w,
gpointer data)
{
LevelsDialog *ld;
int value;
ld = (LevelsDialog *) data;
value = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (ld->low_input_spin));
value = BOUNDS (value, 0, ld->high_input[ld->channel]);
/* enforce a consistent displayed value (low_input <= high_input) */
gtk_spin_button_set_value(GTK_SPIN_BUTTON (ld->low_input_spin), value);
if (value != ld->low_input[ld->channel])
{
ld->low_input[ld->channel] = value;
levels_update (ld, INPUT_LEVELS | INPUT_SLIDERS | DRAW);
if (ld->preview)
levels_preview (ld);
}
}
static void
levels_gamma_text_update (GtkWidget *w,
gpointer data)
{
LevelsDialog *ld;
char *str;
double value;
str = gtk_entry_get_text (GTK_ENTRY (w));
ld = (LevelsDialog *) data;
value = BOUNDS ((atof (str)), 0.1, 10.0);
if (value != ld->gamma[ld->channel])
{
ld->gamma[ld->channel] = value;
levels_update (ld, INPUT_LEVELS | INPUT_SLIDERS | DRAW);
if (ld->preview)
levels_preview (ld);
}
}
static void
levels_high_input_spin_update (GtkWidget *w,
gpointer data)
{
LevelsDialog *ld;
int value;
ld = (LevelsDialog *) data;
value = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (ld->high_input_spin));
value = BOUNDS (value, ld->low_input[ld->channel], 255);
/* enforce a consistent displayed value (high_input >= low_input) */
gtk_spin_button_set_value(GTK_SPIN_BUTTON (ld->high_input_spin), value);
if (value != ld->high_input[ld->channel])
{
ld->high_input[ld->channel] = value;
levels_update (ld, INPUT_LEVELS | INPUT_SLIDERS | DRAW);
if (ld->preview)
levels_preview (ld);
}
}
static void
levels_low_output_spin_update (GtkWidget *w,
gpointer data)
{
LevelsDialog *ld;
int value;
ld = (LevelsDialog *) data;
value = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (ld->low_output_spin));
value = BOUNDS (value, 0, 255);
if (value != ld->low_output[ld->channel])
{
ld->low_output[ld->channel] = value;
levels_update (ld, OUTPUT_LEVELS | OUTPUT_SLIDERS | DRAW);
if (ld->preview)
levels_preview (ld);
}
}
static void
levels_high_output_spin_update (GtkWidget *w,
gpointer data)
{
LevelsDialog *ld;
int value;
ld = (LevelsDialog *) data;
value = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (ld->high_output_spin));
value = BOUNDS (value, 0, 255);
if (value != ld->high_output[ld->channel])
{
ld->high_output[ld->channel] = value;
levels_update (ld, OUTPUT_LEVELS | OUTPUT_SLIDERS | DRAW);
if (ld->preview)
levels_preview (ld);
}
}
static gint
levels_input_da_events (GtkWidget *widget,
GdkEvent *event,
LevelsDialog *ld)
{
GdkEventButton *bevent;
GdkEventMotion *mevent;
char text[12];
double width, mid, tmp;
int x, distance;
int i;
int update = FALSE;
switch (event->type)
{
case GDK_EXPOSE:
if (widget == ld->input_levels_da[1])
levels_update (ld, INPUT_SLIDERS);
break;
case GDK_BUTTON_PRESS:
gtk_grab_add (widget);
bevent = (GdkEventButton *) event;
distance = G_MAXINT;
for (i = 0; i < 3; i++)
if (fabs (bevent->x - ld->slider_pos[i]) < distance)
{
ld->active_slider = i;
distance = fabs (bevent->x - ld->slider_pos[i]);
}
x = bevent->x;
update = TRUE;
break;
case GDK_BUTTON_RELEASE:
gtk_grab_remove (widget);
switch (ld->active_slider)
{
case 0: /* low input */
levels_update (ld, LOW_INPUT | GAMMA | DRAW);
break;
case 1: /* gamma */
levels_update (ld, GAMMA);
break;
case 2: /* high input */
levels_update (ld, HIGH_INPUT | GAMMA | DRAW);
break;
}
if (ld->preview)
levels_preview (ld);
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
gdk_window_get_pointer (widget->window, &x, NULL, NULL);
update = TRUE;
break;
default:
break;
}
if (update)
{
switch (ld->active_slider)
{
case 0: /* low input */
ld->low_input[ld->channel] = ((double) x / (double) DA_WIDTH) * 255.0;
ld->low_input[ld->channel] = BOUNDS (ld->low_input[ld->channel], 0,
ld->high_input[ld->channel]);
break;
case 1: /* gamma */
width = (double) (ld->slider_pos[2] - ld->slider_pos[0]) / 2.0;
mid = ld->slider_pos[0] + width;
x = BOUNDS (x, ld->slider_pos[0], ld->slider_pos[2]);
tmp = (double) (x - mid) / width;
ld->gamma[ld->channel] = 1.0 / pow (10, tmp);
/* round the gamma value to the nearest 1/100th */
sprintf (text, "%2.2f", ld->gamma[ld->channel]);
ld->gamma[ld->channel] = atof (text);
break;
case 2: /* high input */
ld->high_input[ld->channel] = ((double) x / (double) DA_WIDTH) * 255.0;
ld->high_input[ld->channel] = BOUNDS (ld->high_input[ld->channel],
ld->low_input[ld->channel], 255);
break;
}
levels_update (ld, INPUT_SLIDERS | INPUT_LEVELS | DRAW);
}
return FALSE;
}
static gint
levels_output_da_events (GtkWidget *widget,
GdkEvent *event,
LevelsDialog *ld)
{
GdkEventButton *bevent;
GdkEventMotion *mevent;
int x, distance;
int i;
int update = FALSE;
switch (event->type)
{
case GDK_EXPOSE:
if (widget == ld->output_levels_da[1])
levels_update (ld, OUTPUT_SLIDERS);
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
distance = G_MAXINT;
for (i = 3; i < 5; i++)
if (fabs (bevent->x - ld->slider_pos[i]) < distance)
{
ld->active_slider = i;
distance = fabs (bevent->x - ld->slider_pos[i]);
}
x = bevent->x;
update = TRUE;
break;
case GDK_BUTTON_RELEASE:
switch (ld->active_slider)
{
case 3: /* low output */
levels_update (ld, LOW_OUTPUT | DRAW);
break;
case 4: /* high output */
levels_update (ld, HIGH_OUTPUT | DRAW);
break;
}
if (ld->preview)
levels_preview (ld);
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
gdk_window_get_pointer (widget->window, &x, NULL, NULL);
update = TRUE;
break;
default:
break;
}
if (update)
{
switch (ld->active_slider)
{
case 3: /* low output */
ld->low_output[ld->channel] = ((double) x / (double) DA_WIDTH) * 255.0;
ld->low_output[ld->channel] = BOUNDS (ld->low_output[ld->channel], 0, 255);
break;
case 4: /* high output */
ld->high_output[ld->channel] = ((double) x / (double) DA_WIDTH) * 255.0;
ld->high_output[ld->channel] = BOUNDS (ld->high_output[ld->channel], 0, 255);
break;
}
levels_update (ld, OUTPUT_SLIDERS | DRAW);
}
return FALSE;
}
static void
make_file_dlg (gpointer data)
{
gchar *temp;
file_dlg = gtk_file_selection_new (_("Load/Save Levels"));
gtk_window_position (GTK_WINDOW (file_dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect(GTK_OBJECT (GTK_FILE_SELECTION (file_dlg)->cancel_button),
"clicked", (GtkSignalFunc) file_cancel_callback, data);
gtk_signal_connect(GTK_OBJECT (GTK_FILE_SELECTION (file_dlg)->ok_button),
"clicked", (GtkSignalFunc) file_ok_callback, data);
temp = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "levels" G_DIR_SEPARATOR_S,
gimp_directory ());
gtk_file_selection_set_filename (GTK_FILE_SELECTION (file_dlg), temp);
g_free (temp);
}
static void
file_ok_callback (GtkWidget *widget,
gpointer data)
{
FILE *f;
gchar *filename;
filename = gtk_file_selection_get_filename (GTK_FILE_SELECTION (file_dlg));
if (load_save)
{
f = fopen (filename, "rt");
if (!f)
{
g_message (_("Unable to open file %s"), filename);
return;
}
if (!read_levels_from_file (f))
{
g_message (("Error in reading file %s"), filename);
return;
}
fclose (f);
}
else
{
f = fopen(filename, "wt");
if (!f)
{
g_message (_("Unable to open file %s"), filename);
return;
}
write_levels_to_file (f);
fclose (f);
}
gtk_widget_hide (file_dlg);
}
static void
file_cancel_callback (GtkWidget *widget,
gpointer data)
{
gtk_widget_hide (file_dlg);
}
static gint
read_levels_from_file (FILE *f)
{
int low_input[5];
int high_input[5];
int low_output[5];
int high_output[5];
double gamma[5];
int i, fields;
char buf[50], *nptr;
if (!fgets (buf, 50, f))
return FALSE;
if (strcmp (buf, "# GIMP Levels File\n") != 0)
return FALSE;
for (i = 0; i < 5; i++)
{
fields = fscanf (f, "%d %d %d %d ",
&low_input[i],
&high_input[i],
&low_output[i],
&high_output[i]);
if (fields != 4)
return FALSE;
if (!fgets (buf, 50, f))
return FALSE;
gamma[i] = strtod(buf, &nptr);
if (buf == nptr || errno == ERANGE)
return FALSE;
}
for (i = 0; i < 5; i++)
{
levels_dialog->low_input[i] = low_input[i];
levels_dialog->high_input[i] = high_input[i];
levels_dialog->low_output[i] = low_output[i];
levels_dialog->high_output[i] = high_output[i];
levels_dialog->gamma[i] = gamma[i];
}
levels_update (levels_dialog, ALL);
if (levels_dialog->preview)
levels_preview (levels_dialog);
return TRUE;
}
static void
write_levels_to_file (FILE *f)
{
int i;
fprintf (f, "# GIMP Levels File\n");
for (i = 0; i < 5; i++)
{
fprintf (f, "%d %d %d %d %f\n",
levels_dialog->low_input[i],
levels_dialog->high_input[i],
levels_dialog->low_output[i],
levels_dialog->high_output[i],
levels_dialog->gamma[i]);
}
}
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